Drawing mechanism for textile rovings, with feeding belts



F. CASABLANCAS. V A DRAWING IVIECHANISM FOR TEXTILE ROVINGS, WITH FEEDING BELTS.

APPLICATION FILED FEB. I7, 19h21.

Patented May TIG, T922,

*I To all whom ments in spinning frames in sraras FERNANDO CASABLANOAS, 0F SABADELL, SPAIN.

.PATENT oaaic Application led February 17, 192il t may concern:

Be .it known that I, FERNANDO CASA- BLANoAs, a subject of theKing of Spain, residing at Sabadell, Spain, have invented cer. tain new and useul Improvements in Drawing Mechanism for Textile Rovings, with eeding Belts; Vand I do hereby declare the followingto be a full, clear, and exact description. of the invention, such as willV enable others skilled in the art to which it appertains to make and use the same.

f The present invention relates to improvewhich slack endless belts are employed to conduct the roving or textile fibers from the feeding to the drawing rollers.

An object of the invention is to avoid any slippage of the belt and consequently of the roving whereby the fibers will be uniform and regul all'.

' In prior mechanisms for drawing appapage into account of this charthe drawing fibers result on accounty oi this slippage which occurs casually and thereis no way in which 'to take this4 slipor to compensate for 4its I'atus, in which belts or straps action;

Many lattempts have been made heretoore to secure the driving of the belt without f I, any slippage between the same and its driving element. Some attempts have involved the use of ribbed driving rollers with the ribs in engagement lwith the belt, others have proposed to use engraved rollers and to pro-- .-vide' ribs or depressions upon the belt to correspond with the forma-tion given the rollers, `and experiments have also been made to effect this result' by the use of rollerscovered with carding tape. Y However none of these proposed remedies has been-found satisfactoryin pra'ctice andthe commercial thread is not shown to'be improved thereby.

The presentinvention therefore aims to overcomel the `:difficulties method and apparatus and to improve the quality of the article obtained by securing an accurate and uniform driving relation between the drive roller and its belt without incurring any slippage whatsoever.

With the foregoing and other objects in view, the invention will scribed hereinafter, ticularly ,pointed out hereto.

and will be more parin the claims appended Specification of Letters Patent.

Vconstructed the belts 5 of the former a central core upon forward projecting be more fully de-v Patenti-,a May ic, i922.. seal No. 445,782. l

ing, 2 and 3 designate the feeding rollers the roving l as 1t passes rom the feedmg to the drawing rollers Thebelts 5 and 9 extend respectively about are-guided upon their exterior outer runs by rods 6 and 10 and by the guide plates 7 and 1l.

The roller 8 extends through the length of t e machine and is'connected at one of its ends to a driving source which imparts r0- tation to it. The upper 'roller 4 receives rotation by contact through the belts with the driving roller 8.- The weight of the upper roller 4 causes a close. contact between the rollers. In spinningframes asD heretofore upon the inner Iand outer faces and this results in the slipping of the belts and particularly the belt 9 upon the roller 8. y

-f'kccording'to the invention, 'the roller 8 which .drivesthe lower belt 9 has its surface cut or engraved in the form ofsaw teeth as shown on an enlarged scale in Fig. 2. These saw.teeth are inc ined `as shown and they have their pointed ends extending forwardly in the direction of rotation of the roller 8 which is counter-clock-wise as viewed in both figures of the drawing. If

desired, the upper roller 4 may also be prol vided with similar saw teeth, although this is not necessary. The lcutting of the saw teeth may be accomplished by a shaping engine or by other similar machine. These rollers, as indicated in Fig. 2 may comprise which a washer or collar is fitted with saw teeth thereon.

The rot-ation of the .roller will cause the ends of the teeth to bite into the beltthroughout a large area as indicated in Fig. l without however doing injury to the belt due to the smalll penetration at avgreat number-of points.

In accordance with this device, the slipand 9 are smooth both page is shown to be negligible and the roving is shown also to be of a superior uniformity. y

.- It is obvious that various changes 4and modifications may be made in the details off construction and design of the above specifically described embodiment of this invention without departing.- from the spirit thereof, such changes and'modifcations being restricted only by the scope of the following claims.

That is claimed is:

l. A drawing mechanism comprising a pair of feeding rollers, a pair of drawing rollers situated apart from the feeding rollers, a pair of slack belts between the drawing and feeding rollers and adapted to bear yieldingly upon the roving at opposite sides, an idle roller in the upper of said belts bearing upon the lower belt, and a driven v roller engaged through the lower belt beneath said upper roller, said drive roller having inclined teeth thereon with -points projectlng at an angle, such an le J2. In a drawing apparatus, a pair of feedino' rollers a air of drawinfr rollers situbight of the upper belt and bearing upon the lower belt, and a positively driven roller occupying the rear bight of the lower belt and having saw teeth thereon with the inclined pointsof the saw teeth extending in the direction of rotation 0f the roller and adapted to be driven by the rotating motion into the lower belt and to prevent loss of movement there-between.

In testimony whereof, I affix my signature, in presence of two witnesses.

' FERNANDO CASABLANCAS. lVitnesses FERNANDO HARVA,

A. M. VANLE. 

